1 watt-hour
3.6 kJEnergy · definition
The quantity is exact as entered. Comparisons use the clearly stated specimen, model or nominal measurement.
Energy
Just how much energy is 1 watt-hour?
A little work
1 Wh
ENERGY STORED OR TRANSFERRED
1 watt-hour
The quantity is exact as entered.
3.6 kJEnergy
0
Food kilocalorie
A food kilocalorie is the energy needed to raise the temperature of one kilogram of water by one degree Celsius, used to express food energy.
4.184 kJEnergy
0
Bar length represents energy. Equal energy does not imply the same temperature, power or usefulness.
A little perspective
The energy of a food kilocalorie is about 1.16 times 1 watt-hour.
Measurements, assumptions & sources +
1 watt-hour
Energy: 3.6 kJ; definition.
The quantity is exact as entered. Comparisons use the clearly stated specimen, model or nominal measurement.
Food kilocalorie
Energy: 4.184 kJ; defined energy model.
One thermochemical kilocalorie, the unit commonly written Calorie on food labels.
Defined examples — our methodology
The marked energy is calibrated. Unmeasured illustration details are representative.
Measurement details
Why these numbers?
Compare 1 watt-hour with the energy of a food kilocalorie. The notes below explain how each value was chosen.
Food kilocalorie
4.184 kJEnergy · defined energy model
One thermochemical kilocalorie, the unit commonly written Calorie on food labels.
- Comparing
- Energy ↔ Energy
- Relative size
- The energy of a food kilocalorie is about 1.16 times 1 watt-hour. The energy of a food kilocalorie is approximately 16.2% greater than 1 watt-hour.
How to read the visual
The diagram uses the recorded measurements. Details outside the marked spans do not set the scale.
- The energy of a food kilocalorie: This is an illustrative comparison value, not a claim that every example is the same.
Energy is an amount; power describes the rate of energy transfer or use.
3,600 Jjoules
0.001 kWhkilowatt-hours
0.86042 kcalkilocalories
Change your perspective
Put it next to…
Choose a suggestion to redraw the comparison, or open its page to learn what it is.
A little smaller. A little larger.